CN202928199U - A system capable of providing cold and heat stepwise by employing natural gas pressure energy - Google Patents
A system capable of providing cold and heat stepwise by employing natural gas pressure energy Download PDFInfo
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- CN202928199U CN202928199U CN2012206881856U CN201220688185U CN202928199U CN 202928199 U CN202928199 U CN 202928199U CN 2012206881856 U CN2012206881856 U CN 2012206881856U CN 201220688185 U CN201220688185 U CN 201220688185U CN 202928199 U CN202928199 U CN 202928199U
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- gas
- decompressor
- natural gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
Abstract
The utility model provides a system capable of providing cold and heat stepwise by employing natural gas pressure energy. The system can provide cities using gas with natural gas at different pressure stages. Based on the full utilization of pressure energy of high-pressure natural gas, the system combines a gas wave machine used for cold and heat output and an expansion machine used for providing a refrigeration technology. The characteristic that the gas wave machine is adaptive to complex working conditions is well utilized while the high requirements of the expansion machine on the working conditions are met. The system can obtain the heat and cold through the gas wave machine and the expansion machine and provide users with the cold energy and heat energy while meeting the requirements of different cities using gas for the natural gas at different pressure stages.
Description
Technical field
The utility model relates to a kind of system that utilizes pressure energy of natural gas that the cold heat is provided step by step, a kind of pressure that utilizes high-pressure natural gas self specifically, first obtain the cold heat by gas wave machine, by expander refrigeration technique, remaining pressure energy is converted to again the system of cold, and can be the city with the natural gas of air lift for different pressures level system.
Background technology
Pipeline gas generally is transported to urban gate station with high pressure or high pressure mode by long distance pipeline, usually the pressure of natural gas needs voltage adjusting device to carry out multilevel decompression before supplying to the terminal use and processes, so that can satisfy city different pressures level preparing natural gas user's demand.The huge pressure energy that contains in high-pressure natural gas, in passing through the process of voltage adjusting device pressure regulation, this part pressure energy is wasted at present.In addition, due to needs to sharply step-down of natural gas, cooling, be easy to the safe operation of voltage adjusting device and pipe-line equipment is constituted a threat to, therefore in order not allow voltage adjusting device and pipe-line equipment excessively cold, usually need to be configured to the act as a fuel hot-water boiler of gas of natural gas in the pressure regulation process heats, so not only waste the pressure energy of pipe natural gas, but also can consume a part of natural gas, and increased the affiliated facility such as hot-water boiler.If this part pressure energy is used, not only can obtain considerable income, the utilization rate of natural gas can also be improved, and the loss of natural gas can also be reduced.
With the energy of the forms such as the pressure energy energy transform into heat energy of natural gas, cold energy, mainly realize by devices such as decompressor, gas wave machine, vortex tubes at present.Utilize decompressor pressure recovery energy, its refrigerating efficiency can be up to 70～80% usually, but its complex structure, and manufacturing cost is higher, the more important thing is its variable working condition bad adaptability, when the inlet gas changes in flow rate is larger, and refrigerating efficiency that will the appreciable impact decompressor.Though the gas wave machine refrigerating efficiency is less than decompressor, it can adapt to complex working condition, and treating capacity is large, does not need extra energy consumption, can stablize long-play.Although vortex tube is simple in structure, cheap, its refrigerating efficiency is lower, and refrigerating efficiency is subjected to the impact of inlet gas pressure, flow larger, can only be used for some specific occasions.
Therefore, be necessary to design a kind of new heat cryogenic energy utilization system to overcome the defective of existing single technology, can satisfy again the city to the demand of different pressures level preparing natural gas simultaneously.
The utility model content
The purpose of this utility model is to solve the problems of the technologies described above, and provides a kind of and takes full advantage of the high-pressure natural gas pressure energy, and have the adaptive device of higher varying duty.The system and device that utilizes the high-pressure natural gas pressure energy that the heat cold is provided step by step and different pressures level preparing natural gas is provided described in the utility model.To achieve these goals, the utility model system can adopt following technical scheme.
A kind of system that utilizes pressure energy of natural gas that the cold heat is provided step by step, this system comprises: the gas wave machine that is connected with high pressure gas pipeline; The First Heat Exchanger that is arranged on described gas wave machine downstream and is connected with described gas wave machine by natural gas line, be used for utilizing cold that described gas wave machine produces; Be arranged on First Heat Exchanger downstream expansion machine, the expanding end of this decompressor is connected with described First Heat Exchanger by natural gas line, the pressurized end of this decompressor is connected with pressure pipe net in the city, and the expanding end of this decompressor and pressurized end are connected with the second heat exchanger that utilizes cold that described decompressor produces in addition.
Wherein, described gas wave machine also claims heat separator, air wave refrigerating device, is a kind of pressure energy that utilizes gas self to have, thereby shifts by the mode that pressure wave does work and heat is transmitted the equipment that self-energy reaches the refrigeration purpose.
Have no particular limits for gas wave machine in this application, can use the equipment that is purchased.For example can use disclosed gas wave machine in Chinese utility model 201120367297.7, preferred use rotary gas wave machine, it comprises a vibration chamber, be arranged on gas distributor in described vibration chamber and one group is the radial gas distributor oscillating tube on every side that is distributed on.Preferably, described gas distributor comprises a rotor, the air inlet pipe that is connected with rotor.Preferably, described vibration chamber is connected with a blast pipe, the described heat exchanger of other end connection of this blast pipe.Described rotor is provided with at least two nozzles, generally is provided with 2-10 nozzle, and preferred 2-8, more preferably 3-6.
By gas wave machine, pressure energy of natural gas is converted to heat energy and/or cold energy, in order to be used respectively.In addition, the application preferably adopts the wave rotor gas wave machine.The wave rotor gas wave machine mainly is comprised of nozzle, wave rotor, concussion pipe, casing etc., wherein agitates the concussion pipe and is located in casing.For example the wave rotor gas wave machine can use the product of Shenzhen Li Ke company.The wave rotor gas wave machine can be divided into the wave rotor cooling flow throughflow type wave rotor gas wave machine and reverse-flow wave rotor gas wave machine according to port arrangements and the channel interior type of flow.Further preferred self-driving type wave rotor gas wave machine, rotating speed is about the slow-speed of revolution of 2000～3000 rev/mins, can think static equipment, thus the normal stable long-play of assurance system.Be generally-35 ~-45 ℃ through the natural gas temperature after gas wave machine.
Preferably, telling a branch road at First Heat Exchanger and the natural gas line between decompressor is connected with the city pressure piping.
Preferably, the concussion pipe that agitates of described gas wave machine is located in casing.
Preferably, for better utilizing the pressure energy of natural gas, gas wave machine connects a heat utilization device, and the heat that gas wave machine produces is utilized by heat-energy utilizing device.First Heat Exchanger and the second heat exchanger are connected with respectively the cryogenic energy utilization device.
Be generally 0 ~ 5 ℃ through the natural gas temperature after First Heat Exchanger, pressure is 1.2 ~ 1.6MPa.
The preferred turbo-expander of described decompressor.Turbo-expander also is turbine, during with gas expansion speed can variation come transferring energy, being the adiabatic expansion of utilizing gas changes the potential energy of gas into mechanical power.The centripetal runoff reaction turbine of single-stage formula decompressor more preferably, its external work that spreads out of is absorbed by generator, air blast or oil brake.Adiabatic efficiency can reach: middle-pressure expansion machine 65～75%, low-pressure expansion machine 75～85%.
The condition that described decompressor expands is that the entrance gas pressure is controlled at 1.2MPa to 1.6MPa, and after expanding, pressure is 0.2MPa to 0.35MPa, and export gas pressure is controlled at 0.3MPa to 0.4MPa, and temperature is controlled at 25 ℃ to 40 ℃.Preferably, when the downstream user's gas consumption little, can adopt when supply gas pressure is high the series connection two or two above turbo-expanders mode, adopt the modes of two or two above turbo-expanders in parallel when large, the supply gas pressure of user's gas consumption is low when the downstream, to gas pressure and the flow adaptive capacity of actual condition that fluctuates widely, and improve service life of equipment with the raising system.
Be generally 0.2～0.35MPa by the gas pressure after the second heat exchanger, temperature is 0 ~ 5 ℃, enters the decompressor pressurized end, then enters pressure pipe net in the city.
Each section natural gas line and device can be settled valve as required.On natural gas line between decompressor and heat exchanger, flow control valve can be set.
Pressure described here all refers to gauge pressure.
The system that utilizes pressure energy of natural gas that cold is provided step by step of the present utility model has following beneficial effect:
1, the high-pressure natural gas of the complex working condition that advances urban gate station pressure, flowed fluctuation first is converted into heat, cold to pressure energy by gas wave machine.
2, take full advantage of through the stable operating mode of pressure flow after the gas wave machine outlet, enter simultaneously the cold that decompressor utilizes remaining pressure to produce again, the value of natural gas is increased dramatically.
3, utilize gas wave machine and decompressor the acting after, natural gas stable, different pressures level system is provided, satisfy city air feed demand.
When 4, the downstream gas consumption was normal duty, the work energy consumption of unit product was approximately zero, and low pressure natural gas and required heat cold are all from the pressure energy between the high and low pressure pipe network.
Description of drawings:
Fig. 1 is the structure chart that utilizes the pressure energy distribution that the cold system is provided of the present utility model.
The specific embodiment:
Below, utilize pressure energy to distribute to provide the preferred embodiment of cold system to be described in more detail in connection with accompanying drawing to of the present utility model.
See also Fig. 1, a kind of system that utilizes pressure energy of natural gas that the cold heat is provided step by step, this system comprises: the gas wave machine 1 that is connected with high pressure gas pipeline A; Be arranged on described gas wave machine downstream and First Heat Exchanger 2 that be connected with described gas wave machine 1 by natural gas line, that be used for utilizing described gas wave machine 1 cold that produces; Be arranged on the decompressor 3 in First Heat Exchanger 2 downstreams, the expanding end of this decompressor 3 is connected with described First Heat Exchanger 2 by natural gas line, the pressurized end of this decompressor is connected with pressure pipe net C in the city, the expanding end of this decompressor and pressurized end are connected with the second heat exchanger 4 that utilizes cold that described decompressor produces in addition, wherein tell a branch road at First Heat Exchanger 2 and the natural gas line between decompressor 3 and are connected with city pressure piping B.Some optional valves that are used for adjust flux have been drawn in the drawings in addition.For better utilizing the pressure energy of natural gas, gas wave machine 1 connects a heat utilization device, and the heat that gas wave machine produces is utilized by heat-energy utilizing device.The first and second heat exchangers are connected with respectively the cryogenic energy utilization device.
Phase I, (5～10MPa) by after pressure piping A access to plant for high-pressure natural gas, enter gas wave machine 1, wave rotor by incoming flow gases at high pressure compression gas wave machine externally does work to original gas in passage, obtain simultaneously the cold energy of low temperature and the heat energy of high temperature, refrigerating efficiency can reach more than 70%.The external heat release of gas wave machine 1 produces heat energy, and heat supply needs the user; The cryogenic gas of pipeline is connected with First Heat Exchanger 2 simultaneously, and supplying with cold energy needs the user.
Second stage, from gas wave machine 1 out (1.2～1.6MPa), the one tunnel will enter turbo-expander 3 with stable pressure and flow by flow control valve, and remaining gas enters city sub-high pressure pipeline B through natural gas after heat exchange.
Enter the natural gas of turbo-expander 3, externally do work by the adiabatic expansion of decompressor 3, the energy enthalpy of gas reduces, thereby makes gas itself cooling consumingly, and reaches the purpose of refrigeration.The cryogenic gas that produces enters the second heat exchanger 4, and supplying with cold energy needs the user, and (pressure 0.3～0.4MPa) enters pressure pipe net C in the city to the natural gas after the supercharging of heat exchange simultaneously.
Claims (9)
1. a system that utilizes pressure energy of natural gas that the cold heat is provided step by step, is characterized in that, this system comprises: the gas wave machine (1) that is connected with high pressure gas pipeline (A); The First Heat Exchanger (2) that is arranged on described gas wave machine (1) downstream and is connected with described gas wave machine (1) by natural gas line, be used for utilizing described gas wave machine (1) cold that produces; Be arranged on the decompressor (3) in First Heat Exchanger (2) downstream, the expanding end of this decompressor (3) is connected with described First Heat Exchanger (2) by natural gas line, the pressurized end of this decompressor is connected with pressure pipe net (C) in the city, and the expanding end of this decompressor and pressurized end are connected with the second heat exchanger (4) that utilizes cold that described decompressor produces in addition.
2. system according to claim 1, is characterized in that, tells a branch road at First Heat Exchanger (2) and the natural gas line between decompressor (3) and be connected with city pressure piping (B).
3. system according to claim 1, it is characterized in that: described gas wave machine (1) is self-driving type wave rotor gas wave machine.
4. system according to claim 3, it is characterized in that: described self-driving type wave rotor gas wave machine comprises nozzle, wave rotor, concussion pipe, casing, wherein agitates the concussion pipe and is located in casing.
5. system according to claim 1, it is characterized in that: described decompressor (3) is turbo-expander.
6. any one described system according to claim 1-5, it is characterized in that: described gas wave machine (1) connects a heat utilization device, and the heat that gas wave machine produces is utilized by heat-energy utilizing device.
7. any one described system according to claim 1-5, it is characterized in that: described First Heat Exchanger (2) connects a cryogenic energy utilization device, and/or described the second heat exchanger (4) connects a cryogenic energy utilization device.
8. any one described system according to claim 1-5, is characterized in that: on the natural gas line between described decompressor (3) and described First Heat Exchanger (2), flow control valve is set.
9. any one described system according to claim 1-5, it is characterized in that: decompressor (3) is a decompressor or two or more decompressor in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206881856U CN202928199U (en) | 2012-12-13 | 2012-12-13 | A system capable of providing cold and heat stepwise by employing natural gas pressure energy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206881856U CN202928199U (en) | 2012-12-13 | 2012-12-13 | A system capable of providing cold and heat stepwise by employing natural gas pressure energy |
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| CN202928199U true CN202928199U (en) | 2013-05-08 |
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| CN2012206881856U Expired - Lifetime CN202928199U (en) | 2012-12-13 | 2012-12-13 | A system capable of providing cold and heat stepwise by employing natural gas pressure energy |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113149393A (en) * | 2021-03-16 | 2021-07-23 | 东南大学 | Sludge dewatering and drying system driven by natural gas pressure energy |
| CN113389607A (en) * | 2021-06-08 | 2021-09-14 | 东南大学 | High-pressure pipe network pressure energy recovery system |
| CN114561235A (en) * | 2022-01-11 | 2022-05-31 | 广东省氢一能源科技有限公司 | Hydrogen and natural gas mixed transportation and separation device and method based on pressure energy recovery |
-
2012
- 2012-12-13 CN CN2012206881856U patent/CN202928199U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113149393A (en) * | 2021-03-16 | 2021-07-23 | 东南大学 | Sludge dewatering and drying system driven by natural gas pressure energy |
| CN113149393B (en) * | 2021-03-16 | 2024-04-12 | 东南大学 | Natural gas pressure energy driven sludge dewatering and drying system |
| CN113389607A (en) * | 2021-06-08 | 2021-09-14 | 东南大学 | High-pressure pipe network pressure energy recovery system |
| CN114561235A (en) * | 2022-01-11 | 2022-05-31 | 广东省氢一能源科技有限公司 | Hydrogen and natural gas mixed transportation and separation device and method based on pressure energy recovery |
| CN114561235B (en) * | 2022-01-11 | 2022-12-13 | 广东省氢一能源科技有限公司 | Hydrogen and natural gas mixed transportation and separation device and method based on pressure energy recovery |
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Granted publication date: 20130508 |
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| CX01 | Expiry of patent term |